Go to the Wikimedia downloads page: https://dumps.wikimedia.org/
Choose the Wikipedia language edition you want
Select the latest dump date
Download the files you need, such as pages-articles or abstract dumps
Use a torrent file if available for faster downloading
Use a download manager or command-line tool like wget or curl
Extract the downloaded compressed files after the download completes
Use Kiwix if you want an offline Wikipedia reader with prepackaged content
Install the Kiwix app from https://kiwix.org/
Download a Wikipedia ZIM file from the Kiwix library
Open the ZIM file in Kiwix to browse Wikipedia offline